Diversity analyses of microbial enrichments obtained from deep sulfidic water (2000 m) collected from the Black Sea indicated the presence of eleven novel putative lineages of bacteria affiliated to the family Marinifilaceae of the phylum Bacteroidetes. Pure cultures were obtained for four strains (i.e. M1P^T, M3P, A4^T and 44) of this family, which could be grouped into two different clades based on their 16S rRNA gene sequences. All four strains were Gram-negative, rod-shaped and facultative anaerobic bacteria. The genomes of all strains were sequenced and physiological analyses were performed. All strains utilized a wide range of carbon sources, which was supported by the presence of the pathways involved in carbon utilization encoded by their genomes. The strains were able to grow at elevated hydrostatic pressure (up to 50 MPa), which coincided with increased production of unsaturated and branched fatty acids, and a decrease in hydroxy fatty acids. Intact polar lipid analysis of all four strains showed the production of ornithine lipids, phosphatidylethanolamines and capnine lipids as major intact polar lipids (IPLs). Genes involved in hopanoid biosynthesis were also identified. However, bacteriohopanepolyols (BHPs) were not detected in the strains. Based on distinct physiological, chemotaxonomic, genotypic and phylogenetic differences compared to other members of the genera Ancylomarina and Labilibaculum, it was concluded that strains M1P^T and A4^T represented two novel species for which the names Ancylomarina euxinus sp. nov. and Labilibaculum euxinus sp. nov., respectively, are proposed.

从黑海收集深硫化物水（2000米）获得的微生物富集的多样性分析表明的附属于家庭细菌的11个新颖推定谱系的存在Marinifilaceae的门的拟杆菌。获得了四个菌株（即M1P ^T，M3P，A4 ^T和44），可以根据其16S rRNA基因序列分为两个不同的进化枝。所有四个菌株均为革兰氏阴性，杆状和兼性厌氧细菌。对所有菌株的基因组进行测序并进行生理分析。所有菌株均利用了广泛的碳源，其基因组编码的碳利用涉及的途径的存在也为这种菌株提供了支持。菌株能够在较高的静水压力（高达50 MPa）下生长，这与不饱和和支链脂肪酸的产量增加以及羟基脂肪酸的含量降低相吻合。对所有四个菌株进行完整的极性脂质分析表明，鸟氨酸脂质，磷脂酰乙醇胺和卡尼丁脂质的产生是完整的主要极性脂质（IPL）。还鉴定了涉及类胡皮生物合​​成的基因。但是，在菌株中未检测到细菌六聚体多元醇（BHP）。基于与该属其他成员相比明显的生理，化学分类，基因型和系统发育差异Ancylomarina和Labilibaculum，得出结论，菌株M1P ^T和A4 ^T代表两个新的物种，命名为Ancylomarina euxinus sp。十一月 和Labilibaculum euxinus sp.。分别提出。